I had no idea why some of my subscriptions in NNW were a light tan/brown color. See here how “RateMyTeachers.com” and “sportsbbq” are brown:
Turns out that the subscriptions change to that color for feeds that have not updated (added a new post) in 60 days. Perhaps I’m just dense, but this was not obvious to me.
Anyway, if you care to change that color, go to:
Preferences -> Fonts -> General -> Show Color Options...